Chapter 6 - Alkyl Halides: Nucleophilic Substitution and Elimination - Problems - Page 224: Problem 6-5 b

1-bromopropane has the higher molecular dipole moment.

In 1-bromopropane, the $C-Br$ is polar, and has a high dipole moment. On the other hand, cyclopropane has no electronegative atoms, hence its dipole moment is zero. So, 1-bromopropane has the higher molecular dipole moment.